Pressed-steel bolster.



w. n. FoRsYm PRESSED STEEL BOLSTER. API-LFCATION FILED JULY 26,1915.

Patented Feb. l29, 1916.

2 SHEETS-SHEET l.

A Y i.:

Ling is a specification.

*UNUSED STAFF@ FAFENT QFFQE.

WILLIAM D. FORSYTH, OF

YOUNGSTOWN, OHIO, ASSIGNOR TO RAILW'AY PRODUCTS CORPORATION, OF BUFFALO, NEW YORK, A COBORATION OF NEW YORK.

PRESSED-STEEL EOLSTER.

Specification of Letters Patent.

Patented Feb. 22, 1916.

To all whom t may conce/rn:

Be it knoivn that I, lViL-LrAM D. FonsYTH, a citizen of the United States, and a resident of the city of Youngstown, in the county of Mahoning and State of Ohio, have invented a new and useful improvement in Pressed-Steel Bolsters, of which the follow- This invention relates to bolsters for the trucks of railway cars, and particularly to holsters which are composed of pressed steel main members which are riveted together and braced at the middle in the form of a truss.

The objects of the invention are strength, lightness, loiv cost and durability of holsters, and adaptability for use in existing types of car trucks.

The invention consists Vin making the bolster in tivo principal load carrying members, one of which is partly a tension member and partly a compression member and the other is a combined compression member and lateral stitliener, and riveting them together to embrace a middle brace or post,

and in the bolster thus produced, which acts as a truss'for carrying the Weight on the center-plate, and Which' acts as a hori- Zontal girder for withstanding lateral pressure, side thrust and twisting `forces.

Further objects of the invention appear hereinafter in connection With the description of the preferred form of the invention illustrated in the accompanying drawings; and what the invention consists in is more particularly defined in the appended claims.

1n the drawings, wherein the same reference characters designate like parts in the several views, Figure 1 is a top plan view of a bolster embodying the invention; Fig. 2 is a side elevation of the bolster shown in Fig. 1, partly in section on the longitudinal center line; Fig. 8 is a bottom view. and Fig. 4 is an end view, of the same; dig. 5 is a cross-section of the same on the transverse center-line; Fig. 6 is a top plan vievv and Fig. 7 is a side elevation of the main tension and compression member; and Figs. 8 and 9 are a top plan view and a side elevation, respectively, of the main compression and stitfener member of the bolster.

The principal members orn the bolster are the tension and compression member 11, Which forms the chords of a diamond truss, and the combined compression and stiener channel 12, these members are substantially co-extensive and are riveted together for their entire length to form a rigid beam. rlhe diamcnd truss member 11 is made from sheet steel by slitting a suitable blank lengthwise along tivo lines parallel to its margins nearly from end to end, 'forming three distinct sections which remain integrally connected at their ends, and by bendingdovvn the middle section thereof to form the tensio-n tie 13. The side sections are bent at right angles to the original plane of the sheet, forming tivo side compression members 14. IThe brace or center post 15 is inserted between the sides 1i and rests at its loiver end on the tie 13. r1`he compression and stiffener channel 12 is made from a suitable blank by bending down the side margins 16 to form a channel which is inverted over the sides 1t and riveted thereto for its entire length by horizontal rivets through the sides 14: of the member 11 and side margins 16 of the member 12.

rlfhe ends ot the channel 12 are bent down to form pockets for the spring blocks 17. The inner sides of the pockets for the spring blocks are closed by angles 18, which are riveted to the under side of the tie portion 13 of the truss member 11. T he top ot' the center brace or post 15 is provided with a flat plate, which is riveted to the under side of the middle of the channel-shape member 12; and the center pivot-bearing-plate 19 is riveted on top of the channel-shape member 12 at its middle immediately over the center brace. Side bearings 2O of pressed metal are riveted on top of the channelshape member 12 on each side of the center plate toward the ends of the bolster. On each side of the bolster at its ends are riveted guide plates 21 fcr the truck bolster guides. The rivets which secure these guide plates are riveted through both the side marginal flanges 1G of the channel 12 and the sides 14 of the diamond truss 11.

The invention is not restricted to the precise forms and arrangements of the parts as shoivn and described.

TWhat I claim as my invention and desire to secure by Letters Patent is:

1. A car part having a truss member with side sections forming compression chords and a middle section forming a tension chord integrally connected at their ends, a middle brace positioned between said sides `at the middle to said brace, and the ends of said channel being bent down to inclose the ends of said truss member and form'ivith the sides thereofv pockets for bearing blocks at the ends of said truss member 3. A car bolster `having a truss member with ,side sections forming rcompression chords and a middle section forming a tension chord integrally connected at their ends, a middle brace positioned between said sides and bearing on said tension chord, and

a top channel-shape member inclosing said sides and being riveted thereto from end to end, said channel memberbeing connected at the middle to said brace, and a center bearing plate andside bearing plates riveted to the top'of said channel member.

I 4. A car part having a truss member with side sections forming compression chords spaced apart farther'at the middle than at the ends and a middle section forming a tension chord, said sections being integrally connected at their ends, a middle brace positioned between saidv sides'and'bearing on said tension chord and a top channel-shape member Y'Widest at the middle and growing narrower toward the ends to conform to the spacing of said side sections, saidchannelmember inclosing said sides and beingl riveted thereto from end to end, said channeline'mb'ervbeing connected atrthe middle to said brace.

Y V5. Aycarpart having a truss member, a middle brace and a top channel-shape member riveted to said truss member from end to end, said channel-member being connected at the middle to said brace, and the ends oi said channel being bent down to inclose the ends of said truss member. n

6. A car part having al truss'member, a middle brace and a top channel-shape member riveted to said truss member from end to end, said channel-member being connected at the middle to said brace, and the ends of said channel being bent doivn to inclose the ends of said truss member, and 'form end pockets for bearing blocks.

7. A car bolster comprising tension chord, compression chord and middle brace,said

tension chord having flanges along its sides at its tivo ends, the end flanges of each side being integrally connected by a meinber extending alongside of and forming part of the compression `chord andv said compression chord having side Walls einbracing said Vflanges and connecting members from end to end and which are rigidly secured'to said flanges and Vconnecting members throughout their length. p K

8. A car'bolster comprising tension chord,Y vcompression chord and middle brac-e, said tension chord having flanges along itsv sides at its'two ends, the end iianges o t each side beingV integrally connected by a memberextending alongside of andY forming part, of the compression chord and said compression chord having side Walls embracing said flanges and connecting members from end to end and Which are rigidly secured toY said flanges and connecting members throughout their length, and the ends'of said compression chord being secured across the ends of said tension chord and turned down to form end pockets beneath the ends of said tension chord. I 1

Signed at Pittsburgh, Pa., this 22nd day of July, 1915. K c VILLIAM- D. FORSYTH.

Copies of this patent may be obtained for five'cents each'by addressing` the Commissioner csf-Patents, Washington, DI C. 

